*{
	margin: 0;
	padding: 0;
}
body{
	color: #333;
}
.container{
	width: 800px;
	height: 600px;
	box-shadow: 0 0 10px 2px #ccc;
	position: relative;
	margin: 50px auto;
	background-color: #fff;
}
#cvs1,#cvs2{
	position: absolute;
	top: 0;
	left: 0;
}
#cvs1{
	z-index: 1;
}
#cvs2{
	z-index: 0;
}